 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.texteditor;

 import org.eclipse.jface.text.BadLocationException;
 import org.eclipse.jface.text.IDocument;
 import org.eclipse.jface.text.Position;

 import org.eclipse.core.resources.IMarker;


 /**
  * Updates a marker's positional attributes which are start position, end position,
  * and line number.
  */
 class MarkerUpdater implements IMarkerUpdater {

     private final static String [] ATTRIBUTES= {IMarker.CHAR_START, IMarker.CHAR_END, IMarker.LINE_NUMBER};

     /*
      * @see IMarkerUpdater#getAttribute()
      */
     public String [] getAttribute() {
         return ATTRIBUTES;
     }

     /*
      * @see IMarkerUpdater#getMarkerType()
      */
     public String getMarkerType() {
         return null;
     }

     /*
      * @see IMarkerUpdater#updateMarker(IMarker, IDocument, Position)
      */
     public boolean updateMarker(IMarker marker, IDocument document, Position position) {

         if (position.isDeleted())
             return false;

         if (MarkerUtilities.getCharStart(marker) != -1 && MarkerUtilities.getCharEnd(marker) != -1) {
             MarkerUtilities.setCharStart(marker, position.getOffset());
             MarkerUtilities.setCharEnd(marker, position.getOffset() + position.getLength());
         }
         if (MarkerUtilities.getLineNumber(marker) != -1) {
             try {
                 // marker line numbers are 1-based
 MarkerUtilities.setLineNumber(marker, document.getLineOfOffset(position.getOffset()) + 1);
             } catch (BadLocationException x) {
             }
         }

         return true;
     }
 }

